src/dolphindetailsview.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Peter Penz                                      *
   3  *   peter.penz@gmx.at                                                     *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  19  ***************************************************************************/
  20
  21 #include "dolphindetailsview.h"
  22
  23 #include "dolphinmodel.h"
  24 #include "dolphincontroller.h"
  25 #include "dolphinsettings.h"
  26 #include "dolphinsortfilterproxymodel.h"
  27 #include "viewproperties.h"
  28
  29 #include "dolphin_detailsmodesettings.h"
  30
  31 #include <QApplication>
  32 #include <QHeaderView>
  33 #include <QRubberBand>
  34 #include <QPainter>
  35 #include <QScrollBar>
  36
  37 DolphinDetailsView::DolphinDetailsView(QWidget* parent, DolphinController* controller) :
  38     QTreeView(parent),
  39     m_controller(controller),
  40     m_dragging(false),
  41     m_showElasticBand(false),
  42     m_elasticBandOrigin(),
  43     m_elasticBandDestination()
  44 {
  45     Q_ASSERT(controller != 0);
  46
  47     setAcceptDrops(true);
  48     setRootIsDecorated(false);
  49     setSortingEnabled(true);
  50     setUniformRowHeights(true);
  51     setSelectionBehavior(SelectItems);
  52     setDragDropMode(QAbstractItemView::DragDrop);
  53     setDropIndicatorShown(false);
  54     setAlternatingRowColors(true);
  55     // TODO: enable ScrollPerPixel again as soon as a Qt-patch
  56     // is supplied which fixes a possible crash
  57     // (see http://lists.kde.org/?l=kde-core-devel&m=119077433611662&w=2)
  58     //setHorizontalScrollMode(QAbstractItemView::ScrollPerPixel);
  59     //setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
  60
  61     setMouseTracking(true);
  62     viewport()->setAttribute(Qt::WA_Hover);
  63
  64     const ViewProperties props(controller->url());
  65     setSortIndicatorSection(props.sorting());
  66     setSortIndicatorOrder(props.sortOrder());
  67
  68     connect(header(), SIGNAL(sectionClicked(int)),
  69             this, SLOT(synchronizeSortingState(int)));
  70
  71     connect(parent, SIGNAL(sortingChanged(DolphinView::Sorting)),
  72             this, SLOT(setSortIndicatorSection(DolphinView::Sorting)));
  73     connect(parent, SIGNAL(sortOrderChanged(Qt::SortOrder)),
  74             this, SLOT(setSortIndicatorOrder(Qt::SortOrder)));
  75
  76     // TODO: Connecting to the signal 'activated()' is not possible, as kstyle
  77     // does not forward the single vs. doubleclick to it yet (KDE 4.1?). Hence it is
  78     // necessary connecting the signal 'singleClick()' or 'doubleClick' and to handle the
  79     // RETURN-key in keyPressEvent().
  80     if (KGlobalSettings::singleClick()) {
  81         connect(this, SIGNAL(clicked(const QModelIndex&)),
  82                 this, SLOT(slotItemActivated(const QModelIndex&)));
  83     } else {
  84         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
  85                 this, SLOT(slotItemActivated(const QModelIndex&)));
  86     }
  87     connect(this, SIGNAL(entered(const QModelIndex&)),
  88             this, SLOT(slotEntered(const QModelIndex&)));
  89     connect(this, SIGNAL(viewportEntered()),
  90             controller, SLOT(emitViewportEntered()));
  91     connect(controller, SIGNAL(zoomIn()),
  92             this, SLOT(zoomIn()));
  93     connect(controller, SIGNAL(zoomOut()),
  94             this, SLOT(zoomOut()));
  95
  96     // apply the details mode settings to the widget
  97     const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
  98     Q_ASSERT(settings != 0);
  99
 100     m_viewOptions = QTreeView::viewOptions();
 101
 102     QFont font(settings->fontFamily(), settings->fontSize());
 103     font.setItalic(settings->italicFont());
 104     font.setBold(settings->boldFont());
 105     m_viewOptions.font = font;
 106
 107     updateDecorationSize();
 108 }
 109
 110 DolphinDetailsView::~DolphinDetailsView()
 111 {
 112 }
 113
 114 bool DolphinDetailsView::event(QEvent* event)
 115 {
 116     if (event->type() == QEvent::Polish) {
 117         // Assure that by respecting the available width that:
 118         // - the 'Name' column is stretched as large as possible
 119         // - the remaining columns are as small as possible
 120         QHeaderView* headerView = header();
 121         headerView->setStretchLastSection(false);
 122         headerView->setResizeMode(QHeaderView::ResizeToContents);
 123         headerView->setResizeMode(0, QHeaderView::Stretch);
 124
 125         // hide columns if this is indicated by the settings
 126         const DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 127         Q_ASSERT(settings != 0);
 128         if (!settings->showDate()) {
 129             hideColumn(DolphinModel::ModifiedTime);
 130         }
 131
 132         if (!settings->showPermissions()) {
 133             hideColumn(DolphinModel::Permissions);
 134         }
 135
 136         if (!settings->showOwner()) {
 137             hideColumn(DolphinModel::Owner);
 138         }
 139
 140         if (!settings->showGroup()) {
 141             hideColumn(DolphinModel::Group);
 142         }
 143
 144         if (!settings->showType()) {
 145             hideColumn(DolphinModel::Type);
 146         }
 147
 148         hideColumn(DolphinModel::Rating);
 149         hideColumn(DolphinModel::Tags);
 150     }
 151
 152     return QTreeView::event(event);
 153 }
 154
 155 QStyleOptionViewItem DolphinDetailsView::viewOptions() const
 156 {
 157     return m_viewOptions;
 158 }
 159
 160 void DolphinDetailsView::contextMenuEvent(QContextMenuEvent* event)
 161 {
 162     QTreeView::contextMenuEvent(event);
 163     m_controller->triggerContextMenuRequest(event->pos());
 164 }
 165
 166 void DolphinDetailsView::mousePressEvent(QMouseEvent* event)
 167 {
 168     m_controller->triggerActivation();
 169
 170     QTreeView::mousePressEvent(event);
 171
 172     const QModelIndex index = indexAt(event->pos());
 173     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 174         const Qt::KeyboardModifiers modifier = QApplication::keyboardModifiers();
 175         if (!(modifier & Qt::ShiftModifier) && !(modifier & Qt::ControlModifier)) {
 176             clearSelection();
 177         }
 178     }
 179
 180     if (event->button() == Qt::LeftButton) {
 181         m_showElasticBand = true;
 182
 183         const QPoint pos(contentsPos());
 184         m_elasticBandOrigin = event->pos();
 185         m_elasticBandOrigin.setX(m_elasticBandOrigin.x() + pos.x());
 186         m_elasticBandOrigin.setY(m_elasticBandOrigin.y() + pos.y());
 187         m_elasticBandDestination = event->pos();
 188     }
 189 }
 190
 191 void DolphinDetailsView::mouseMoveEvent(QMouseEvent* event)
 192 {
 193     QTreeView::mouseMoveEvent(event);
 194     if (m_showElasticBand) {
 195         updateElasticBand();
 196     }
 197 }
 198
 199 void DolphinDetailsView::mouseReleaseEvent(QMouseEvent* event)
 200 {
 201     QTreeView::mouseReleaseEvent(event);
 202     if (m_showElasticBand) {
 203         updateElasticBand();
 204         m_showElasticBand = false;
 205     }
 206 }
 207
 208 void DolphinDetailsView::dragEnterEvent(QDragEnterEvent* event)
 209 {
 210     if (event->mimeData()->hasUrls()) {
 211         event->acceptProposedAction();
 212     }
 213
 214     if (m_showElasticBand) {
 215         updateElasticBand();
 216         m_showElasticBand = false;
 217     }
 218     m_dragging = true;
 219 }
 220
 221 void DolphinDetailsView::dragLeaveEvent(QDragLeaveEvent* event)
 222 {
 223     QTreeView::dragLeaveEvent(event);
 224
 225     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 226     m_dragging = false;
 227     setDirtyRegion(m_dropRect);
 228 }
 229
 230 void DolphinDetailsView::dragMoveEvent(QDragMoveEvent* event)
 231 {
 232     QTreeView::dragMoveEvent(event);
 233
 234     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 235     setDirtyRegion(m_dropRect);
 236     const QModelIndex index = indexAt(event->pos());
 237     if (!index.isValid() || (index.column() != DolphinModel::Name)) {
 238         m_dragging = false;
 239     } else {
 240         m_dragging = true;
 241         m_dropRect = visualRect(index);
 242         setDirtyRegion(m_dropRect);
 243     }
 244 }
 245
 246 void DolphinDetailsView::dropEvent(QDropEvent* event)
 247 {
 248     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 249     if (!urls.isEmpty()) {
 250         event->acceptProposedAction();
 251         m_controller->indicateDroppedUrls(urls,
 252                                           m_controller->url(),
 253                                           indexAt(event->pos()),
 254                                           event->source());
 255     }
 256     QTreeView::dropEvent(event);
 257     m_dragging = false;
 258 }
 259
 260 void DolphinDetailsView::paintEvent(QPaintEvent* event)
 261 {
 262     QTreeView::paintEvent(event);
 263     if (m_showElasticBand) {
 264         // The following code has been taken from QListView
 265         // and adapted to DolphinDetailsView.
 266         // (C) 1992-2007 Trolltech ASA
 267         QStyleOptionRubberBand opt;
 268         opt.initFrom(this);
 269         opt.shape = QRubberBand::Rectangle;
 270         opt.opaque = false;
 271         opt.rect = elasticBandRect();
 272
 273         QPainter painter(viewport());
 274         painter.save();
 275         style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
 276         painter.restore();
 277     }
 278
 279     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 280     if (m_dragging) {
 281         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 282         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 283     }
 284 }
 285
 286 void DolphinDetailsView::keyPressEvent(QKeyEvent* event)
 287 {
 288     QTreeView::keyPressEvent(event);
 289
 290     const QItemSelectionModel* selModel = selectionModel();
 291     const QModelIndex currentIndex = selModel->currentIndex();
 292     const bool triggerItem = currentIndex.isValid()
 293                              && (event->key() == Qt::Key_Return)
 294                              && (selModel->selectedIndexes().count() <= 1);
 295     if (triggerItem) {
 296         m_controller->triggerItem(currentIndex);
 297     }
 298 }
 299
 300 void DolphinDetailsView::setSortIndicatorSection(DolphinView::Sorting sorting)
 301 {
 302     QHeaderView* headerView = header();
 303     headerView->setSortIndicator(sorting, headerView->sortIndicatorOrder());
 304 }
 305
 306 void DolphinDetailsView::setSortIndicatorOrder(Qt::SortOrder sortOrder)
 307 {
 308     QHeaderView* headerView = header();
 309     headerView->setSortIndicator(headerView->sortIndicatorSection(), sortOrder);
 310 }
 311
 312 void DolphinDetailsView::synchronizeSortingState(int column)
 313 {
 314     // The sorting has already been changed in QTreeView if this slot is
 315     // invoked, but Dolphin is not informed about this.
 316     DolphinView::Sorting sorting = DolphinSortFilterProxyModel::sortingForColumn(column);
 317     const Qt::SortOrder sortOrder = header()->sortIndicatorOrder();
 318     m_controller->indicateSortingChange(sorting);
 319     m_controller->indicateSortOrderChange(sortOrder);
 320 }
 321
 322 void DolphinDetailsView::slotEntered(const QModelIndex& index)
 323 {
 324     const QPoint pos = viewport()->mapFromGlobal(QCursor::pos());
 325     const int nameColumnWidth = header()->sectionSize(DolphinModel::Name);
 326     if (pos.x() < nameColumnWidth) {
 327         m_controller->emitItemEntered(index);
 328     }
 329     else {
 330         m_controller->emitViewportEntered();
 331     }
 332 }
 333
 334 void DolphinDetailsView::updateElasticBand()
 335 {
 336     Q_ASSERT(m_showElasticBand);
 337     QRect dirtyRegion(elasticBandRect());
 338     m_elasticBandDestination = viewport()->mapFromGlobal(QCursor::pos());
 339     dirtyRegion = dirtyRegion.united(elasticBandRect());
 340     setDirtyRegion(dirtyRegion);
 341 }
 342
 343 void DolphinDetailsView::zoomIn()
 344 {
 345     if (isZoomInPossible()) {
 346         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 347         // TODO: get rid of K3Icon sizes
 348         switch (settings->iconSize()) {
 349         case K3Icon::SizeSmall:  settings->setIconSize(K3Icon::SizeMedium); break;
 350         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeLarge); break;
 351         default: Q_ASSERT(false); break;
 352         }
 353         updateDecorationSize();
 354     }
 355 }
 356
 357 void DolphinDetailsView::zoomOut()
 358 {
 359     if (isZoomOutPossible()) {
 360         DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 361         // TODO: get rid of K3Icon sizes
 362         switch (settings->iconSize()) {
 363         case K3Icon::SizeLarge:  settings->setIconSize(K3Icon::SizeMedium); break;
 364         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeSmall); break;
 365         default: Q_ASSERT(false); break;
 366         }
 367         updateDecorationSize();
 368     }
 369 }
 370
 371 bool DolphinDetailsView::isZoomInPossible() const
 372 {
 373     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 374     return settings->iconSize() < K3Icon::SizeLarge;
 375 }
 376
 377 bool DolphinDetailsView::isZoomOutPossible() const
 378 {
 379     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 380     return settings->iconSize() > K3Icon::SizeSmall;
 381 }
 382
 383 void DolphinDetailsView::updateDecorationSize()
 384 {
 385     DetailsModeSettings* settings = DolphinSettings::instance().detailsModeSettings();
 386     const int iconSize = settings->iconSize();
 387     m_viewOptions.decorationSize = QSize(iconSize, iconSize);
 388
 389     m_controller->setZoomInPossible(isZoomInPossible());
 390     m_controller->setZoomOutPossible(isZoomOutPossible());
 391
 392     doItemsLayout();
 393 }
 394
 395 QPoint DolphinDetailsView::contentsPos() const
 396 {
 397     // implementation note: the horizonal position is ignored currently, as no
 398     // horizontal scrolling is done anyway during a selection
 399     const QScrollBar* scrollbar = verticalScrollBar();
 400     Q_ASSERT(scrollbar != 0);
 401
 402     const int maxHeight = maximumViewportSize().height();
 403     const int height = scrollbar->maximum() - scrollbar->minimum() + 1;
 404     const int visibleHeight = model()->rowCount() + 1 - height;
 405     if (visibleHeight <= 0) {
 406         return QPoint(0, 0);
 407     }
 408
 409     const int y = scrollbar->sliderPosition() * maxHeight / visibleHeight;
 410     return QPoint(0, y);
 411 }
 412
 413 QRect DolphinDetailsView::elasticBandRect() const
 414 {
 415     const QPoint pos(contentsPos());
 416     const QPoint topLeft(m_elasticBandOrigin.x() - pos.x(), m_elasticBandOrigin.y() - pos.y());
 417     return QRect(topLeft, m_elasticBandDestination).normalized();
 418 }
 419
 420 static bool isValidNameIndex(const QModelIndex& index)
 421 {
 422     return index.isValid() && (index.column() == KDirModel::Name);
 423 }
 424
 425 void DolphinDetailsView::slotItemActivated(const QModelIndex& index)
 426 {
 427     if (!isValidNameIndex(index)) {
 428         clearSelection();
 429         m_controller->emitItemEntered(index);
 430     } else {
 431         m_controller->triggerItem(index);
 432     }
 433 }
 434
 435 #include "dolphindetailsview.moc"